Finding The Unknown Truth [SATZU]

character's

Minatozaki sana :

A single parent of a 15 year old girl.
37 years old . Works in a company.
Very hard working. Doesn't trust in love. Her daughter is her everything or you can say her first priority.

Minatozaki sullyoon :

15 years old. She is tired of her life. Always gets bullied. Loves her mother. But sometimes fight with her . Don't know who her other parent is. Doesn't talk with anyone in class. Likes to stay quiet.

Other characters:

Twice members.
Some members from other groups will be mentioned too.